Product Contents: Sensor Unit (with new battery) Remote Control (with new battery) Cigarette Plug Cord No instruction manual included. Please download it from the Yupiteru website. Also, the adhesive on the double-sided tape for fixing is weak. The remote control has some scratches. Purchased new about 10 years ago and used for about 3 years. I purchased a new genuine battery from the Yupiteru online shop and confirmed some of the functions, and they worked normally. The confirmed functions are: starting and canceling the alert (automatic/manual), detecting abnormalities (alarm and LED flashing in silent mode), remote control reception of alarms, and switching modes (silent mode, intimidation pattern). I only confirmed the detection of abnormalities by tilting and opening/closing the door. Since the battery has been replaced with a new one for the function check, you can be assured about the battery for a while. When shipping, the battery will be removed to prevent malfunction. According to the instruction manual, automatic alert starts 1 minute after the key is turned off if there is no door opening/closing. However, with the auto ACC function, if power is still supplied from the cigarette socket for about 3 minutes after the key is turned off, the automatic alert will start about 4 minutes after the key is turned off. (It may also start after opening/closing the door after about 3 minutes after the key is turned off, but this has not been confirmed.) Thank you.